Geological Factors Affecting Methane in the Beckley Coalbed John T. Popp Published: 1976 Total Pages: 44 Get eBook
Geology, Mining, and Methane Content of the Freeport and Kittanning Coalbeds in Indiana and Surrounding Counties, Pa Donald G. Puglio Published: 1979 Total Pages: 44 Get eBook
Selected Geologic Factors Affecting Mining of the Pittsburgh Coalbed Published: 1975 Total Pages: 84 Get eBook
Degasification Study from an Air Shaft in the Beckley Coalbed Tobias W. Goodman Published: 1982 Total Pages: 28 Get eBook
